Stuxnet didn't work though. Sure, it very likely damaged some of Iran's Uranium enrichment centrifuges and set their program back by months perhaps, but those months have passed. Iran has a fully capable Uranium enrichment infrastructure. They have the enrichment capacity to build bombs within a matter of months at most. All they need to do is take their existing Uranium stockpiles and run it through their existing enrichment infrastructure. Claims that it would be "oh so difficult" for them to build bombs are Iranian propaganda at best.

Iran has been very savvy here. They've built the capacity to become a nuclear weapons power on a moment's notice without actually putting weapons in service or having nuclear weapons tests. So far they've avoided the worst negative consequences of acquiring nuclear weapons.